From 0ee4199b072f968bf13b9bf322c9b3c37169dc98 Mon Sep 17 00:00:00 2001 From: Paul Green Date: Wed, 24 Apr 2002 14:27:00 -0400 Subject: fix vos/vos.c to implement pow(0,0) Message-Id: <200204242252.SAA07978@mailhub1.stratus.com> p4raw-id: //depot/perl@16170 --- vos/vos.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'vos') diff --git a/vos/vos.c b/vos/vos.c index a72614c3f3..9876d705b4 100644 --- a/vos/vos.c +++ b/vos/vos.c @@ -2,6 +2,8 @@ /* Written 02-01-02 by Nick Ing-Simmons (nick@ing-simmons.net) */ /* Modified 02-03-27 by Paul Green (Paul.Green@stratus.com) to add socketpair() dummy. */ +/* Modified 02-04-24 by Paul Green (Paul.Green@stratus.com) to + have pow(0,0) return 1, avoiding c-1471. */ /* End of modification history */ #include @@ -35,3 +37,22 @@ socketpair (int family, int type, int protocol, int fd[2]) { errno = ENOSYS; return -1; } + +/* Supply a private version of the power function that returns 1 + for x**0. This avoids c-1471. Abigail's Japh tests depend + on this fix. We leave all the other cases to the VOS C + runtime. */ + +double s_crt_pow(double *x, double *y); + +double pow(x,y) +double x, y; +{ + if (y == 0e0) /* c-1471 */ + { + errno = EDOM; + return (1e0); + } + + return(s_crt_pow(&x,&y)); +} -- cgit v1.2.1